Stove or furnace



R. G. SPEER.

STOVE R FURNACE. APPLICATION FILED M161], 1917- RENEWED 011T. 15,1319- Patented Mar. 2, 1920.

INVENTQR ROBERT. G. SI-FIElIt,v OF ST. LOUIS, MISSOURI.

STOVE 0R FURNACE;

Specification of Letterslatent.

Patented Mar. 2, 1220.

Application filed August 27, 1917, Serial No. 188,312. Renewed October 15; 1919. Serial No. 330,834.

1 '0 all "whom it may concern:

Be it known that I, Bonner Gr. SPEER, a citizen of the United States, residing in the city of St. Louis, State of Missouri, have invented a certain new and useful Improve ment in Stoves or Furnaces, of which the followingis a full, clear, and exact description, such as will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanying drawings, forming a part ofthisspecification.

My invention relates to improvements in stoves or furnaces such as are ordinarily used for heating and cooking purposes, the principal objects of my invention being to provide a stove or furnacehaving apair of grates or fuel-bearing members and to arrange between said grates one or more hydrocarbon burners, the gaseous fuel for which is generated by the heat from the burning fuel on the lower grate and the flames resulting from the combustion'ofthe gaseous fuel being efiective in: promoting combustion ofthe carbonaceous material on the grates, therebyv eliminating the free carbon or soot which would otherwise be given oil from the carbonaceous material during combustion and at the same time creating a hotter fire thereby enabling the stove or furnace to be operated with less fuel than is ordinarily required.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts hereinafter more fully described, claimed and illustrated in the accompanying drawings in which- Figure 1 is a front elevational view of a stove or furnace constructed in accordance with my invention with the lower portion of said stove or furnace in vertical section.

Fig. 2 is a horizontal section taken approximately on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged vertical section taken approximately on the line 3-3 of Fig. 2.

Fig. 4 is a horizontal section (reduced) taken on line H of Fig. 1.

Referring by numerals to the accompanying drawings, 10 designates the body of a stove or furnace, 11, the usual door opening in said body through which fuel is introduced, 12, the doors normally closing said opening, 13 the fire-pot, 14 the usual grate below said fire-pot and 15 the ash-pit below said grate. These parts are of ordinary construction and form no part of my invention.

llly improvement includes a grate 16 which is horizontally disposed in the body 10 a suitable distance above the fire-pot and in. position so that fuel may be placed on said grate through the door opening 11. The frontof this grate is cut away to form an opening 16 which establishes communication between the spaces above and below the grate. Located within the fire-pot a short distance above rate l-l is a pipe 17, the samebeing bent so that it lies adjacent to the .vall of the fire-pot, the chamber within said pipe serving as a gas generating chambenitbeing understood that said pipe is supplied with liquid hydro-carbon from a pipe 18 which latter leads from a suitable source of supply. The ends'of pipe 17 terminate adjacent to the sides of fire-pot 13 and said ends are connected to short vertically disposed'pipes 19, the latter being connected t'o short horizontally disposed pipes 20, the latter projecting outwardly through the wall of fire-pot 13. (See Fig; 2.) "The outerwend's of these pipes 20 are connected to short rearwardly extendingpipes 21, the rear ends of the latter being connected to short inwardly projecting pipe sections 22, the inner ends of the latter being provided with caps 23 in which are formed jet openings 2 1. These caps 2-3 are positioned immediately outside the wall 13 of the iii-spot and directly opposite openings 25 which are formed in said fire-pot wall, said open ings being substantially larger in diameter than said caps. The pipes 22 and caps 23 carried thereby are supported upon brackets or inclined plates 26, the latter being secured to the wall of the fire-pot directly beneath the openings Secured to the in side face of the fire-pot wall iimncdiately above the openings 25 are inwardly and downwardly inclined deflector plates 27, the

lower portions of which are directly opposite the openings 25 and the jet openings in caps 23. (See Fig.

The operation of my improved stove or furnace is as follows: Fuel, such as wood or coal, is placed on grate 14 also on grate 16, and liquid hydro-carbon is-permitted to flow through supply pipe 18 to generator pipe 17. The fuel on grate 14: is ignited and in a short time the heat from the burning fuel converts the liquid hydro-carbon within pipe 17 into gas, and as the latter becomes heated it expands thereby creating a certain amount of pressure and the gas thus gen tures, and the gas and air thus combined strike against the inclined deflector plates 27, thus being thoroughl mixed, spread and deflected downwardly onto the bed of fuel on said grate 14, with the result that all smoke and free carbon arising from said burning bed of fuel will be consumed and a comparatively hot fire will be produced within the fire-pot. Inasmuch as the combustion of the gaseous fuel and the gases arising from the bed of fuel on grate 14 will be comparatively slow, the amount of fuel required to feed the fire on grate 1 1 will be comparatively small. The flames from the fire thus produced within the fire-pot will pass upwardlythrough opening 16 at the side of the upper grate and will, in a short time, ignite the fuel on said upper grate and said fuel will burn with little, if any, free carbon. The pressure of the as produced within pipe 17 is usually sufllcient to maintain the necessary draft through the stove or furnace, but if any air is needed to support combustion it can be admitted beneath grates l4 and 16 through the usual draft openings.

A stove or furnace of my improved construction is comparatively simple, requires little attention after being once started, produces a comparatively high degree of heat and can be operated with great economy by reason of the fact that proportionately a small amount of fuel such aswood or coal is required to maintain a hot fire and, further,

by reason of the fact that low grades of coal may be burned on the grates.

I claim- In a stove or furnace, a fire-pot, a pair of grates arranged therein and disposed one above the other, the upper one of which grates is cut away on one side so as to provide an opening to permit flames from the burning fuel on the lower grate to pass upwardly over the fuel on the upper grate, there being openings formed through the wall of the firepot above the lower grate, a tube arranged within the fire-pot above the lower grate, which tube is adapted to contain liquid hydro-carbon, tubular connections leading from the ends of said tube outwardly through the wall of the fire-pot and thence to points directly opposite the openings in the fire-potwall, jet caps on the ends of said tubular connections, which jet caps are directed toward the openings in the wall of thefire-pot, and deflecting members arranged within the stove or furnace above the openings in the wall of the firepot, said deflecting members being inclined so as to deflect jets from the jet caps downwardly onto the lower one of the grates.

In testimony whereof I hereunto affix my signature this 22nd day of August, 1917.

ROBERT Gr. srnnn. 

